Posted by PennyPA on 9/6/2009, 4:48 pm, in reply to "Re: Big time advice needed!!!!!!!!!"
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I don't think an E tank will last 12 hours on 2lpm unless it's pulse. When I have to use my E tank instead of the concentrator at night, it usually lasts about 10 hours on a setting of 1 lpm continuous.
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